How to fix my method that connects to a Server in C? - c

Question

I am working on an assignment where I need to connect multiple clients on to one server. I am instructed to write a method that connects to. I tried several different ways of doing it, but it doesn't result in connecting. I need help in finding where the problem occurs and what I can do to fix it in order for the method to work in connecting to the server. I am working with sockets.
I am doing this on the client side since the client connects with the server. I keep resulting in the connection failing to connect with the server. Therefore, here is my code I have so far.
**
Client Side
**
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#define MAX 80
#define PORT 9064
#define SA struct sockaddr
int callServer(char *host, int portno) // connect to a server
{
int sockfd, connfd;
struct sockaddr_in servaddr, cli;
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = inet_addr(&host);
servaddr.sin_port = htons(portno);
return connect(sockfd, (SA*)&servaddr, sizeof(servaddr)); // I return the an int.
}
int main()
{
int sockfd, connfd;
struct sockaddr_in servaddr, cli;
char thing[100] = "10.35.195.47";
// socket create and varification
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd == -1)
{
printf("socket creation failed...\n");
exit(0);
}
else
printf("Socket successfully created..\n");
bzero(&servaddr, sizeof(servaddr));
// connect the client socket to server socket
if (callServer(thing, PORT) != 0) //connect(sockfd, (SA*)&servaddr, sizeof(servaddr)) != 0)
{
printf("connection with the server failed...\n");
exit(0);
}
else
printf("connected to the server..\n");
//callServer(thing, PORT);
// function for chat
func(sockfd);
// close the socket
close(sockfd);
return 0;
}
Now I tried several ways of doing this. This might not be the right approach but this is the 4th different approach I tried in creating this method. As of right now, I am unclear which one is the correct approach.
Server Side
#include <stdio.h>
#include <netdb.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#define MAX 80
#define PORT 9064
#define SA struct sockaddr
int setupServerSocket(int portno) // setup a server socket
{
int serversocket, serv_bind;
struct sockaddr_in servaddr, cli;
serversocket = socket(AF_INET, SOCK_STREAM, 0);
if(serversocket < 0)
{
printf("Failed to create server\n");
}
else
printf("Socket successfully created..\n");
bzero(&servaddr, sizeof(servaddr));
// assign IP, PORT
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
servaddr.sin_port = htons(portno); //port number given by user
// Binding newly created socket to given IP and verification
if ((bind(serversocket, (SA*)&servaddr, sizeof(servaddr))) != 0)
{
printf("socket bind failed...\n");
exit(0);
}
else
printf("Socket successfully binded..\n");
return serversocket;
}
int main()
{
int sockfd = setupServerSocket(9064), connfd, len;
struct sockaddr_in servaddr, cli;
// Now server is ready to listen and verification
if ((listen(sockfd, 5)) != 0)
{
printf("Listen failed...\n");
exit(0);
}
else
printf("Server listening..\n");
len = sizeof(cli);
// Accept the data packet from client and verification
connfd = accept(sockfd, (SA*)&cli, &len);
if (connfd < 0)
{
printf("server acccept failed...\n");
exit(0);
}
else
printf("server acccept the client...\n");
// Function for chatting between client and server
func(connfd);
// After chatting close the socket
close(sockfd);
}
Let me know.